Lean Six Sigma Yellow Belt Certification General 4 — Questions and Answers
Question 1: What is the purpose of the 5S methodology?
- To identify five root causes of defects
- To organize and maintain a clean, efficient workplace (Correct answer)
- To measure five key performance indicators
- To train five levels of belt certification
Correct answer: To organize and maintain a clean, efficient workplace
5S (Sort, Set in Order, Shine, Standardize, Sustain) is a systematic approach to organizing workplaces to improve efficiency and safety.
Question 2: Which type of data is measured on a continuous scale, such as weight or temperature?
- Attribute data
- Discrete data
- Variable data (Correct answer)
- Categorical data
Correct answer: Variable data
Variable (or continuous) data can take any value within a range and is measured on a continuous scale, enabling more powerful statistical analysis.
Question 3: What is a 'baseline' measurement in Lean Six Sigma?
- The minimum acceptable quality level
- The current performance level before improvements are made (Correct answer)
- The target level set by management
- The average performance over the past 10 years
Correct answer: The current performance level before improvements are made
A baseline measurement documents current process performance so teams can quantify improvement after changes are implemented.
Question 4: Which of the following is a key output of the Control phase in DMAIC?
- Root cause analysis report
- Revised project charter
- Control plan to sustain improvements (Correct answer)
- Customer requirements document
Correct answer: Control plan to sustain improvements
The Control phase produces a control plan that documents how improvements will be monitored and maintained over time.
Question 5: A fishbone (Ishikawa) diagram is used to:
- Plot defect frequency over time
- Visualize potential causes of a problem (Correct answer)
- Map the steps in a process
- Display data distribution
Correct answer: Visualize potential causes of a problem
A fishbone diagram organizes potential causes of a problem into categories, helping teams brainstorm and identify root causes.
Question 6: What does 'Process Capability' (Cp) measure?
- The average output of a process
- How well a process fits within specification limits (Correct answer)
- The number of operators needed for a process
- The speed at which a process runs
Correct answer: How well a process fits within specification limits
Process Capability (Cp) compares process spread to specification limits to determine if the process can consistently produce conforming output.
Question 7: What is meant by 'Voice of the Customer' (VOC) in Lean Six Sigma?
- Customer complaints logged in a database
- The process of capturing customer needs and expectations (Correct answer)
- A survey tool used only in the Control phase
- Feedback from internal customers only
Correct answer: The process of capturing customer needs and expectations
VOC is a structured method for gathering and analyzing what customers truly need, which drives project goals and improvements.
Lean Six Sigma Yellow Belt Certification General 4
What is the purpose of the 5S methodology?